LT3466 Ver la hoja de datos (PDF) - Linear Technology
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LT3466 Datasheet PDF : 20 Pages
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LT3466
ELECTRICAL CHARACTERISTICS The ● denotes specifications that apply over the full operating temperature
range, otherwise specifications are at TA = 25°C. VIN = 3V, VCTRL1 = 3V, VCTRL2 = 3V, unless otherwise specified.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Converter 1 Current Limit
(Note 5)
● 320
400
mA
Converter 2 Current Limit
(Note 5)
● 320
400
mA
Converter 1 VCESAT
ISW1 = 300mA
360
mV
Converter 2 VCESAT
ISW2 = 300mA
360
mV
Switch 1 Leakage Current
VSW1 = 10V
0.01
5
µA
Switch 2 Leakage Current
CTRL1 Voltage for Full LED Current
VSW2 = 10V
0.01
5
µA
● 1.8
V
CTRL2 Voltage for Full LED Current
● 1.8
V
CTRL1 or CTRL2 Voltage to Turn-On the IC
150
mV
CTRL1 and CTRL2 Voltages to Shut Down the IC
50
mV
CTRL1, CTRL2 Pin Bias Current
VCTRL1 = VCTRL2 = 1V
●8
10
12
µA
VOUT1 Overvoltage-Lockout Threshold
VOUT2 Overvoltage-Lockout Threshold
VOUT1 Rising
VOUT2 Rising
39.5
V
39.5
V
Schottky 1 Forward Drop
ISCHOTTKY1 = 300mA
0.85
V
Schottky 2 Forward Drop
ISCHOTTKY2 = 300mA
0.85
V
Schottky 1 Reverse Leakage
Schottky 2 Reverse Leakage
VOUT1 = 20V
VOUT2 = 20V
5
µA
5
µA
Soft-Start Time (Switcher 1)
600
µs
Soft-Start Time (Switcher 2)
600
µs
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT3466E is guaranteed to meet specified performance from
0°C to 70°C. Specifications over the –40°C to 85°C operating range are
assured by design, characterization and correlation with statistical process
controls.
Note 3: Current flows out of the pin.
Note 4: Guaranteed by design and test correlation, not production tested.
Note 5: Current limit is guaranteed by design and/or correlation to static
test. Slope compensation reduces current limit at high duty cycle.
TYPICAL PERFOR A CE CHARACTERISTICS
Switching Waveforms
VOUT1
50mV/DIV
VSW1
20V/DIV
IL1
100mA/DIV
VIN = 3.6V
0.5µs/DIV
CIRCUIT OF FIGURE 1
3466 G01
Transient Response
VOUT1
0.5V/DIV
VCTRL1
2V/DIV
IL1
200mA/DIV
VIN = 3.6V
50µs/DIV
ILED1 = 20mA TO 10mA
CIRCUIT OF FIGURE 1
3466 G02
3466fa
3
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